Energy and Matter in Ecosystems Review

The diagram shows an energy pyramid.

Which pair of organisms contain the highest and lowest amounts of available energy, in that order?

• hawk and snake

• cactus and mice

• hawk and cactus

• cactus and hawk

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Put the levels from largest to smallest

• Community

• Ecosystem

• Biosphere

• Population

• Biome

A caterpillar eats a leaf, and a bird eats the caterpillar. In this interaction, the bird is a:

• producer

• herbivore

• primary consumer

• secondary consumer

What are plants called in a food chain?

• Producers
• Consumers
• Decomposers
• Scavengers

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In an energy pyramid, energy_______ as you move up the pyramid.

• Increases
• Decreases
• Stays the same
• Changes up and down

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A community is ________________________.

• Both biotic and abiotic factors.

• All the populations living in an area that interact.

• Ecosystem

• Organism

What is it called when plants give off water vapor as a waste product?

• condensation
• evaporation
• sublimation
• transpiration

The diagram shows a food web from a forest ecosystem.

Based on the food web, which is a true statement?

• A decrease in the population of owls may eventually decrease the population of lizards.

• A decrease in the population of beetles may eventually decrease the population of snakes.

• An increase in the population of beetles may eventually decrease the population of snakes and lizards.

• An increase in the owl population may eventually increase the population of snakes and lizards.

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A food chain is shown.

corn → locust → lizard → snake

Which statement describes the organisms in the food chain?

• There is 1 predator, 2 herbivores, and 1 producer.

• There are 2 consumers and 2 producers.

• There are 3 producers and 1 consumer

• There are 2 predators, 1 herbivore, and 1 producer.

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The flow of energy and the movement of chemical compounds is part of a dynamic equilibrium in an ecosystem. Which statement is an accurate description of energy and chemical compounds within an ecosystem?

• Energy moves from one organism in the food chain to another. Chemical compounds are recycled and used over and over again.

• Energy moves from one organism in the food chain to another. Chemical compounds remain with an organism permanently.

• Energy is produced by each organism in the ecosystem. Chemical compounds are passed from one organism to another.

• Energy is introduced into the system during each step of the food chain. Chemical compounds remain with an organism permanently.

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